A large extinct ungulate artiodactyl mammal of the genus Anthracotherium (family Anthracotheriidae) or the group including this genus, known from fossil remains in Tertiary deposits, especially of lignite. Also (in form Anthracotherium): the genus itself.
Early 19th century. From scientific Latin anthracotherium, genus name from anthraco- + -therium (in e.g. Megatherium), in allusion to the finding of its remains in lignite (brown coal) deposits.